Nanomaterials,
Год журнала:
2024,
Номер
14(16), С. 1352 - 1352
Опубликована: Авг. 15, 2024
Photocatalysis
is
the
most
promising
green
approach
to
solve
antibiotic
pollution
in
water,
but
actual
treatment
effect
limited
by
photocatalytic
activity.
Herein,
Bi
and
BiOCl
were
loaded
onto
surface
of
Ce-MOF
(metal–organic
framework)
using
an
electrostatic
adsorption
method,
a
special
ternary
heterojunction
Ce/Bi/BiOCl
was
successfully
prepared
as
photocatalyst
for
degradation
tetracycline
(TC).
FTIR
demonstrated
that
obtained
contains
functional
groups
such
-COOH
belonging
characteristic
crystal
planes
BiOCl,
indicating
successful
construction
photocatalyst.
The
results
UV–vis
absorption
spectra
confirm
band
gap
reduced
from
3.35
eV
2.7
eV,
resulting
enhanced
light
capability
visible
region.
constructed
Ce-MOF,
Bi,
could
achieve
narrow
reasonable
structure,
thereby
enhancing
separation
photogenerated
charges.
Consequently,
performance
significantly
compared
BiOCl.
Therefore,
can
rate
97.7%
within
20
min,
which
much
better
than
(14.8%)
(67.9%).
This
work
MOF-based
photocatalysts
revealed
relationship
between
heterojunctions
provides
inspiration
constructing
other
heterogeneous
catalysts
use
field
photocatalysis.
Catalysts,
Год журнала:
2025,
Номер
15(1), С. 56 - 56
Опубликована: Янв. 9, 2025
The
increasing
concentration
of
antibiotics
in
natural
water
poses
a
significant
threat
to
society’s
sustainable
development
due
pollution.
Photocatalytic
technology
is
an
efficient
and
environmentally
friendly
approach
environmental
purification,
offering
great
potential
for
addressing
pollution
attracting
attention
from
scholars
worldwide.
TiO2,
as
representative
semiconductor
photocatalytic
material,
exhibits
strong
oxidation
ability
excellent
biocompatibility.
However,
its
wide
band
gap
the
rapid
recombination
photo-generated
electron–hole
pairs
significantly
limit
applications.
Recent
studies
indicate
that
constructing
heterojunctions
with
synergistic
plasmonic
effects
effective
strategy
developing
high-performance
photocatalysts.
In
this
study,
Bi
metal
nanoparticles
(BiO)2CO3
nanosheets
were
simultaneously
grown
on
TiO2
nanofibers
via
situ
hydrothermal
method,
successfully
forming
Bi@(BiO)2CO3/TiO2
composite
fiber
photocatalyst
effects.
surface
plasmon
resonance
(SPR)
effect
combined
(BiO)2CO3/TiO2
heterojunction
enhances
sunlight
absorption,
facilitates
separation
carriers,
strengthens
photo-oxidation
reduction
abilities.
This
system
effectively
generates
abundant
hydroxyl
(·OH)
superoxide
(·O2−)
radicals
under
excitation.
Consequently,
exhibited
outstanding
performance.
Under
simulated
60
min,
photodegradation
efficiencies
quinolone
lomefloxacin,
ciprofloxacin,
norfloxacin
reached
93.2%,
97.5%,
100%,
respectively.
also
demonstrates
stability
reusability.
study
represents
step
toward
application
TiO2-based
materials
purification.
The Chemical Record,
Год журнала:
2023,
Номер
24(3)
Опубликована: Дек. 12, 2023
Abstract
Semiconductor
photocatalysis
has
great
potential
in
the
fields
of
solar
fuel
production
and
environmental
remediation.
Nevertheless,
photocatalytic
efficiency
still
constrains
its
practical
applications.
The
development
new
semiconductor
materials
is
essential
to
enhance
energy
conversion
systems.
Recently,
research
on
enhancing
performance
semiconductors
by
introducing
bismuth
(Bi)
attracted
widespread
attention.
In
this
review,
we
briefly
overview
main
synthesis
methods
Bi/semiconductor
photocatalysts
summarize
control
micromorphology
Bi
Bi/semiconductors
key
role
catalytic
system.
addition,
promising
applications
photocatalysis,
such
as
pollutant
degradation,
sterilization,
water
separation,
CO2
reduction,
N2
fixation,
are
outlined.
Finally,
an
outlook
challenges
future
directions
given.
We
aim
offer
guidance
for
rational
design
high‐efficiency
Materials,
Год журнала:
2024,
Номер
17(4), С. 957 - 957
Опубликована: Фев. 19, 2024
In
the
present
work,
photodegradation
of
Rhodamine
B
with
different
pH
values
by
using
Bi2O3
microrods
under
visible-light
irradiation
was
studied
in
terms
dye
degradation
efficiency,
active
species,
mechanism,
and
pathway.
X-ray
diffractometry,
polarized
optical
microscopy,
scanning
electron
fluorescence
spectrophotometry,
diffuse
reflectance
spectra,
Brunauer–Emmett–Teller,
photoelectron
spectroscopy,
Fourier-transform
infrared
UV–visible
total
organic
carbon,
liquid
chromatography–mass
spectroscopy
analysis
techniques
were
used
to
analyze
crystal
structure,
morphology,
surface
structures,
band
gap
values,
catalytic
performance,
mechanistic
The
photoluminescence
spectra
spectrum
(the
are
2.79
eV)
reveals
that
absorption
extended
visible
region,
which
resulted
a
high
separation
low
recombination
rate
electron–hole
pairs.
results
clearly
indicated
had
removal
efficiencies
about
97.2%,
90.6%,
50.2%
within
120
min
at
3.0,
5.0,
7.0,
respectively.
addition,
mineralization
RhB
evaluated
measuring
effect
on
chemical
oxygen
demand
carbon
value
3.0.
At
same
time,
quenching
experiments
carried
out
understand
core
reaction
species
involved
solution
values.
diffractometer
pre-
post-Bi2O3
showed
BiOCl
formed
Bi2O3,
BiOCl/Bi2O3
heterojunction
after
acid
photocatalytic
degradation.
Furthermore,
substances
possible
mechanism
over
analyzed
based
radical
capture,
analysis,
spectroscopy.
intermediates
photocatalyst
light
also
identified
assistance
Water,
Год журнала:
2024,
Номер
16(17), С. 2389 - 2389
Опубликована: Авг. 25, 2024
In
this
study,
fusiform
bismuth
(Bi)
was
synthesized,
and
its
photocatalytic
performance,
degradation
mechanism,
pathways
for
removing
rhodamine
B
(RhB)
at
different
pH
levels
were
investigated.
Additionally,
the
morphologies,
structural
characteristics,
surface
electronic
states,
optical
properties,
active
species,
potential
of
RhB
over
Bi
analyzed.
The
comparison
results
before
after
using
revealed
formation
a
Bi/BiOCl
heterojunction
photocatalyst.
At
2.0,
3.0,
5.0,
7.0,
9.0,
exhibited
excellent
activity,
with
removal
efficiencies
~97%,
96.7%,
72.6%,
53.5%,
27.6%,
respectively.
Moreover,
total
organic
carbon
chemical
oxygen
demand
analyses
performed
to
evaluate
mineralization
rates
3.0
7.0.
Furthermore,
effects
catalyst
content,
initial
concentration,
light
source
distance,
inorganic
anions,
reactant
temperature
on
performance
types
species
mechanisms
(3.0
7.0)
elucidated.
appropriate
identified
via
liquid
chromatography–mass
spectrometry